Readme preview should render for packages on private feeds

[ggx-ggx]

NuGet Product(s) Affected

Visual Studio Package Management UI

Current Behavior

When nuget reference code is in a private github repo, no readme preview is generated in UI in VS package management.

Desired Behavior

for such cases we have a few different options

1. we can may be give option to "download package to review readme", instead of default "learn more how to embed readme" in preview tab, this solves for all type of repos ( withinking org, some other org with there own private repo which i cant access)
2. somehow pick git credentials as i am already working with git in VS and i am already logged in. i should have access to all org repos. this will be a common case for most companies using private nuget repo server and private code repos.
3. allow configuring git api / creds so you can access private repos as well.

Additional Context

No response

[zivkan]

This is related to:

• “Browse” tab can’t show the embedded icon of the package from DevOps private feeds #9250

NuGet's Package Manager UI doesn't authenticate to private feeds for any embedded resource (icon, license, readme).

Once NuGet authenticates to feeds to download these embedded resources, it will still require GitHub to implement the relevant part of the NuGet protocol for readmes to work.